671325321778 has 8 divisors (see below), whose sum is σ = 1007158589568. Its totient is φ = 335605791924.

The previous prime is 671325321767. The next prime is 671325321791. The reversal of 671325321778 is 877123523176.

671325321778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28419726 + ... + 28443337.

It is an arithmetic number, because the mean of its divisors is an integer number (125894823696).

Almost surely, 2^671325321778 is an apocalyptic number.

671325321778 is a deficient number, since it is larger than the sum of its proper divisors (335833267790).

671325321778 is a wasteful number, since it uses less digits than its factorization.

671325321778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56868968.

The product of its digits is 2963520, while the sum is 52.

The spelling of 671325321778 in words is "six hundred seventy-one billion, three hundred twenty-five million, three hundred twenty-one thousand, seven hundred seventy-eight".